userns: Modify dqget to take struct kqid

Modify dqget to take struct kqid instead of a type and an identifier
pair.

Modify the callers of dqget in ocfs2 and dquot to take generate
a struct kqid so they can continue to call dqget.  The conversion
to create struct kqid should all be the final conversions that
are needed in those code paths.

Cc: Jan Kara <jack@suse.cz>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>

3 files changed, 16 insertions, 14 deletions

diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index 46a1f6d75104..5a4ee77cec51 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -1184,8 +1184,7 @@ int ocfs2_setattr(struct dentry *dentry, struct iattr *attr)
                 if (attr->ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid
                     && OCFS2_HAS_RO_COMPAT_FEATURE(sb,
                     OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
-                        transfer_to[USRQUOTA] = dqget(sb, attr->ia_uid,
-                                                      USRQUOTA);
+                        transfer_to[USRQUOTA] = dqget(sb, make_kqid_uid(attr->ia_uid));
                         if (!transfer_to[USRQUOTA]) {
                                 status = -ESRCH;
                                 goto bail_unlock;
@@ -1194,8 +1193,7 @@ int ocfs2_setattr(struct dentry *dentry, struct iattr *attr)
                 if (attr->ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid
                     && OCFS2_HAS_RO_COMPAT_FEATURE(sb,
                     OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
-                        transfer_to[GRPQUOTA] = dqget(sb, attr->ia_gid,
-                                                      GRPQUOTA);
+                        transfer_to[GRPQUOTA] = dqget(sb, make_kqid_gid(attr->ia_gid));
                         if (!transfer_to[GRPQUOTA]) {
                                 status = -ESRCH;
                                 goto bail_unlock;
diff --git a/fs/ocfs2/quota_local.c b/fs/ocfs2/quota_local.c
index f100bf70a906..020f0ba29ee5 100644
--- a/fs/ocfs2/quota_local.c
+++ b/fs/ocfs2/quota_local.c
@@ -501,7 +501,9 @@ static int ocfs2_recover_local_quota_file(struct inode *lqinode,
                         }
                         dqblk = (struct ocfs2_local_disk_dqblk *)(qbh->b_data +
                                 ol_dqblk_block_off(sb, chunk, bit));
-                        dquot = dqget(sb, le64_to_cpu(dqblk->dqb_id), type);
+                        dquot = dqget(sb,
+                                      make_kqid(&init_user_ns, type,
+                                                le64_to_cpu(dqblk->dqb_id)));
                         if (!dquot) {
                                 status = -EIO;
                                 mlog(ML_ERROR, "Failed to get quota structure "
diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index 80d337822462..53e377a59b05 100644
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -829,8 +829,10 @@ static struct dquot *get_empty_dquot(struct super_block *sb, int type)
  *   a) checking for quota flags under dq_list_lock and
  *   b) getting a reference to dquot before we release dq_list_lock
  */
-struct dquot *dqget(struct super_block *sb, unsigned int id, int type)
+struct dquot *dqget(struct super_block *sb, struct kqid qid)
 {
+        unsigned int type = qid.type;
+        unsigned int id = from_kqid(&init_user_ns, qid);
         unsigned int hashent = hashfn(sb, id, type);
         struct dquot *dquot = NULL, *empty = NULL;
 
@@ -1390,7 +1392,6 @@ static int dquot_active(const struct inode *inode)
  */
 static void __dquot_initialize(struct inode *inode, int type)
 {
-        unsigned int id = 0;
         int cnt;
         struct dquot *got[MAXQUOTAS];
         struct super_block *sb = inode->i_sb;
@@ -1403,18 +1404,19 @@ static void __dquot_initialize(struct inode *inode, int type)
 
         /* First get references to structures we might need. */
         for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
+                struct kqid qid;
                 got[cnt] = NULL;
                 if (type != -1 && cnt != type)
                         continue;
                 switch (cnt) {
                 case USRQUOTA:
-                        id = inode->i_uid;
+                        qid = make_kqid_uid(inode->i_uid);
                         break;
                 case GRPQUOTA:
-                        id = inode->i_gid;
+                        qid = make_kqid_gid(inode->i_gid);
                         break;
                 }
-                got[cnt] = dqget(sb, id, cnt);
+                got[cnt] = dqget(sb, qid);
         }
 
         down_write(&sb_dqopt(sb)->dqptr_sem);
@@ -1898,9 +1900,9 @@ int dquot_transfer(struct inode *inode, struct iattr *iattr)
                 return 0;
 
         if (iattr->ia_valid & ATTR_UID && iattr->ia_uid != inode->i_uid)
-                transfer_to[USRQUOTA] = dqget(sb, iattr->ia_uid, USRQUOTA);
+                transfer_to[USRQUOTA] = dqget(sb, make_kqid_uid(iattr->ia_uid));
         if (iattr->ia_valid & ATTR_GID && iattr->ia_gid != inode->i_gid)
-                transfer_to[GRPQUOTA] = dqget(sb, iattr->ia_gid, GRPQUOTA);
+                transfer_to[GRPQUOTA] = dqget(sb, make_kqid_gid(iattr->ia_gid));
 
         ret = __dquot_transfer(inode, transfer_to);
         dqput_all(transfer_to);
@@ -2381,7 +2383,7 @@ int dquot_get_dqblk(struct super_block *sb, struct kqid qid,
 {
         struct dquot *dquot;
 
-        dquot = dqget(sb, qid.type, from_kqid(&init_user_ns, qid));
+        dquot = dqget(sb, qid);
         if (!dquot)
                 return -ESRCH;
         do_get_dqblk(dquot, di);
@@ -2494,7 +2496,7 @@ int dquot_set_dqblk(struct super_block *sb, struct kqid qid,
         struct dquot *dquot;
         int rc;
 
-        dquot = dqget(sb, qid.type, from_kqid(&init_user_ns, qid));
+        dquot = dqget(sb, qid);
         if (!dquot) {
                 rc = -ESRCH;
                 goto out;